Welcome to the Java, DSA, Spring, Spring Boot, and Hibernate 2025 repository! This repository contains a collection of Java code from Beginner to Advanced levels, along with explanations of various Data Structures and Algorithms (DSA) concepts, Spring framework, Spring Boot development, Hibernate ORM, and Maven.
The aim of this repository is to provide a comprehensive understanding of Java programming, common DSA problems, Spring framework, Spring Boot development, Hibernate ORM, and Maven, along with solutions and their explanations. Whether you're a beginner or preparing for interviews, you'll find code examples, explanations, and problem-solving strategies for various topics.
- Introduction to Java
- Variables, Data Types, Operators
- Conditionals, Loops & Switch Statements
- Functions & Methods (Method Overloading, Recursion)
- Introduction to Arrays & ArrayLists
- Declaring and Initializing Arrays and ArrayLists
- Linear Search
- Binary Search
- Binary Search on 2D Arrays
- Bubble Sort
- Selection Sort
- Insertion Sort
- Cycle Sort
- Kadane’s Algorithm (Maximum subarray)
- Boyer-Moore Algorithm (Majority element in an array)
- Manipulating Strings
- String Methods
- StringBuilder class and its operations
- Understanding Recursion and Recursion Trees
- Recursion Examples
- Big-O Notation
- Time Complexity Analysis
- Space Complexity Analysis
- Bitwise Operations (AND, OR, XOR, NOT)
- Number Systems (Decimal, Binary, Hexadecimal, Octal)
- Prime Numbers, Sieve of Eratosthenes
- GCD, LCM, Modular Arithmetic
- Solving problems using Backtracking
- Examples: N-Queens, Subset Sum, etc.
- Classes, Objects, Constructors, and Keywords
- Instance vs. Static variables and methods
- Principles of OOP
- Inheritance, Polymorphism, Encapsulation, Abstraction
- Additional OOP Concepts
- Packages, Exception Handling, Lambda Expressions
- Object Cloning, Generics, Collections Framework
- Stack Implementation using Arrays & Linked Lists
- Circular Queue, Priority Queue
- Singly Linked List
- Doubly Linked List
- Circular Singly Linked List
- Circular Doubly Linked List
- Hash Functions & Collision Resolution Techniques
- Binary Trees, Traversals (Inorder, Preorder, Postorder)
- AVL Trees, Segment Trees
- Min-Heap, Max-Heap, Heap Sort
- Maven Project Setup
- Dependency Management
- Maven Lifecycle and Plugins
- Introduction to Spring
- Spring Core, Spring MVC
- Dependency Injection, Bean Management
- Spring AOP and Transactions
- Introduction to Spring Boot
- Creating REST APIs with Spring Boot
- Spring Boot Annotations
- Spring Boot with PostgreSQL
- CRUD Operations using Hibernate
- Mapping Relationships (OneToOne, OneToMany, ManyToOne, ManyToMany)
- Hibernate Caching
- Introduction to HQL
- Get vs Load
- Difference between String and StringBuffer
- Performance Considerations
- Reading and Writing Files in Java
- FileInputStream, FileOutputStream, BufferedReader, BufferedWriter
This repository will soon include:
- DSA Interview Questions & Solutions
- Problem-Solving Strategies
- Code Walkthroughs
git clone https://github.com/Anirudh1103/Complete-Java-DSA-OOPs-SpringBoot.git